Classify the substances according to the strongest solute-solvent interaction th

Question

Classify the substances according to the strongest solute-solvent interaction that will occur between the given substances and water during dissolution. AlCl3 , HF, C2H5OH, FeBr3

1. Ion-dipole forces

2. Hydrogen Bonding

3. Dipole-dipole forces

4. London dispersion forces

Rank from first step to last step, to rank items as equivalent Overlap them.

A. Dissolved cations and anions begin to deposit as a solid salt

B. rate of dissolution is equal to the rate of recrystallization

C. hydration of cations

D. dissociation of salt into its cations and anions

E. hydration of anions

Explanation / Answer

AlCl3 + H2O ---------> Al(OH)3 + HCl

So AlCl3 has ion dipole forces with H2O

HF + H2O -------> H3O+ + F-

Dipole Dipole forces

C2H5OH + H2O -----------> C2H5OH----O of H2O

Hydrogen Bonding

FeBr3 + H2O   ----------> no reaction

London dispersion forces

1) D. dissociation of salt into its cations and anions

2) C. hydration of cations

3) E. hydration of anions

4) A. Dissolved cations and anions begin to deposit as a solid salt

5) B. rate of dissolution is equal to the rate of recrystallization

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